Not medical advice. Kidney disease, pregnancy, athletes, and medications change fluid needs — ask a clinician.
0Liters / day (approx)
0Glasses (250 ml)
Water intake (illustrative)
Rough liters per day from weight — adjust for climate and activity.
A simple hydration starting point
Water intake calculators are best used as rough planning tools, not strict prescriptions. Body weight, climate, exercise, pregnancy, breastfeeding, and medical conditions all affect fluid needs, so the result should be treated as a starting estimate only.
Why context matters
Someone training outdoors in hot weather will need more fluid than someone sitting at a desk in a cool room. If you have a medical reason to manage fluids, follow your clinician's advice rather than relying on a general web calculator.
Hydration context
Hot climates, pregnancy, breastfeeding, and endurance sport increase fluid needs beyond generic weight-based estimates.
Hydration reality
Food and other beverages count toward fluids — adjust for climate and doctor orders.
Everyday context
Tea, soup, and fruit contribute fluids even though people think about glasses of water. Treat the daily estimate as a conversation starter with a clinician if you have kidney, heart, or pregnancy considerations.
Exercise days
Long runs and hot yoga sessions increase sweat losses. Add extra fluid on training days rather than relying on a single static daily target.
Quick start
- Enter body weight — Use the unit shown on the page for your weight.
- Read daily fluid goal — The estimate is illustrative — athletes, climate, and medical conditions change needs.
- Adjust with your clinician — Do not treat output as medical advice; follow doctor guidance when restricting fluids.